Butt-joint.



PATENTED MAY 16, 1905.

F. c. KELSEY.

BUTT JOINT. APPILIOATION FILED 811213.10, 1903.

Patented May 16, 1905.

PATENT OFFICE.

FRANK C. KELSEY, OF SALT LAKE CITY, UTAH.

BUTT-JOINT.

SPECIFICATION forming part of Letters Patent No. 790,257, dated May 16,1905.

' Application filed September 10, 1903. Serial No. 172,687.

To all whom it may concern:

Be it known that I, FRANKC. KnLsnY, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake and State ofUtah, have invented new and useful Improvements in Butt-Joints, of whichthe following is a specification.

This invention is a butt or end joint for strips or staves in pipe madeof Wooden staves bound together for conveying water and other liquidsunder pressure. The strips or staves are made in various lengths and thepipe is put together so that the end joints are broken and do not comeopposite each other.

The joints are made with a casting into which the ends of the staves fittightly. Each casting is preferably made in one piece of malleablecast-iron and with flanges which cover the joint on the inside and theoutside of the pipe and project onto the adjoining staves,whichtherefore holds the ends of the staves in position and preventsthem from being forced out by the pressure from the inside of the pipe.It Will be seen that the casing consists, in effect, of an inner footBfor engaging the concave or inner portions of the staves, an outer foot0 for engaging the convex or' outer portions of the staves, and a webportion A, connecting together the inner and the outer foot. The outerflange has a slight taper on its inner side which Wedges the ends of thestaves into place, where they are driven endwise, and insures a tightfit. The casting secures the ends of the staves and the flanges coverthe joint on the inside and the outside of the pipe, making itwater-tight. The adjoining staves help to strengthen and support thejoint by means of the flanges which project upon them.

Theaccompanying drawings illustrate the invention, its various featuresbeing referred to by letters, similar letters denoting correspondingparts in the several. views.

Figure 1 is a side elevation of my improved joint, the staves beingshown in section. Fig. 2 is a vertical section through the metallicbutt-joint; and Fig. 3 is a plan view, reduced in size, of a butt-jointand the staves engaging the same.

The letter A indicates the body of the joint to reduce its weight. Theopenings at a are preferably cast therein. The sides of this body areflat and its edges are formed to correspond to the surfaces of the workto which the joint is to be applied, here shown to be curved for use ona Wooden pipe. This body should be thick enough to serve its purposeandof the same Width as the thickness of the staves used in constructingthe pipe, so that some force will be required to connect the staves withthe joint. The flanges 0f the joint stand at a right angle to the bodyAand projecli, both laterally and longitudinally from the bee y.

B indicates th inner flange of the .device, having a longitudinalcurvature concentric with that of the pipe and sufficiently broad andlong to lap over onto the contiguous staves D D and d d to insureastrong and tight connection therewith.

C is the outer flange, corresponding in length, breadth, and curvaturewith the inner flange B. 0 is a slight taper on the inner side of thisflange B, which has already been referred to as insuring a tight fit ofthe staves in the joint as the ends (1 are driven in.

I The special advantages claimed for this joint over other devices forthis purpose are that it makes a stronger and tighter pipe. It is alsoeasier to construct the pipe with this joint, as it guides the ends ofthe staves into position and holds them as the pipe is beingconstructed.

It is evident that this joint may be mad straight as well as curved andbe applied to connect the ends of straight timbers. I do not, therefore,limit myself to the exact form shown in the drawings. I

Having now described the invention, what I claim, and desire to secureby Letters Patent of the United States, is

1. As an article of manufacture, a metallic member comprising an outerfoot provided with a curved surface for engaging the outer surfaces ofstaves, an inner foot provided with a curved surface for engaging theinner surfaces of said staves, said curved surfaces being concentricwith each other and adapted to engage opposite faces of the staves, anda Web integrally connecting said inner foot and said outer foottogether.

2. As an article of manufacture, a metallic member comprising an outerfoot provided with a curved surface, an inner foot provided with acurved surface, said curved surfaces being concentric with each otherand adapted to engage opposite faces of the staves, and a Web connectingsaid inner foot and said outer foot together, said Web being of suchdimensions that said inner foot and said outer foot overlap theboundaries of said web, substantially as described.

3. As an article of manufacture, a metallic member comprising an outerfoot provided With a curved surface, an inner foot provided with acurved surface, said curved surfaces being concentric with each otherand adapted to engage opposite faces of the staves, and a Web connectingboth said outer foot and said inner foot together, said web occupying acomparatively narrow plane and being overlapped by the ends of saidouter foot and of said inner foot.

4:. As an article of manufacture, a butt-joint comprising an outer footprovided with a curved surface for engaging the outer surfaces ofstaves, a web connected with said outer foot, and an inner footconnected with said Web, said outer foot and said inner foot each beinglonger than said web for the purpose of overlapping the edges of stavesabutting said Web.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK C. KELSEY.

Witnesses:

ALFRED (J. REESE, ORRIE A. TIBBE'ITS.

